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Subject: Re: [ubl-lcsc] Rate and Ratio
I agree with Tony. There are too many business specific meanings for each of those words, and to try to substitute one for the other is simply inviting disaster. A ratio means nothing without context, as Tony says 1:4 means nothing to anyone, but if you qualify it with gear ratio, it makes sense. A rates are typically percents, but that is not totally true in all cases either. In the US tax rates may be expressed as mils or as percents, so again we are at context determining which term to use. I will always think of speed as "measurement". Measurement always needs a unit of measure. The number 4 means nothing without a unit of meausrement associated with it. 4 km/hr means something. This would open a hole that will never close....let's leave ratio as ratio and rate as rate. Regards, ____________________ Alan Stitzer AVP Marsh USA Inc. 1133 Avenue of the Americas New York, NY 10036-2774 Phone: (561) 743-1938 Fax: (561) 743-1993 Internet: Alan.Stitzer@marsh.com ____________________ <<< Memo from abcoates@londonmarketsystems.com@Internet on 07 August, 2003, 05:17:25 PM Thursday >>> abcoates@londonmarketsystems.com@Internet on 7 Aug 2003, 17:17 Thursday Please respond to abcoates@londonmarketsystems.com@Internet To: marion royal; ubl-lcsc cc: (bcc: Alan Stitzer) Subject: Re: [ubl-lcsc] Rate and Ratio ** Reply to message from marion.royal@gsa.gov on Thu, 7 Aug 2003 16:57:13 -0400 > An alternative of "ratio" was offered, but I'm not sure this was resolved. > The problem may be that we habitually use incorrect terms, especially > within our domains. I looked around a bit and noticed that in mathematics, > rate is used to compare two unlike units of measurement as in "kilometers > per hour" and ratio is used for comparison of numbers of the same units of > measure (gear ratio is 1:4). The units of a ratio are typically not > expressed. Ratios never have units, they are pure numbers. > A currency exchange is a comparison of two different units, so currency > exchange rate would be accurate. > > A percentage seems to me to be a ratio. A tax of 10 percent would equate > to a ratio of 1 to 10 dollars. Likewise with discounts. > > Does this make sense to you? Does it have a dramatic impact on business > vocabularies? To my mind, there is no way UBL could hope to promote the idea of a "tax ratio" for what the world calls a "tax rate". A tax rate is indeed the ratio of the tax you pay to your gross earnings, but this is simply too subtle. Rate is just a very general concept, and I would suggest that all you can do is qualify it appropriately for each context. Cheers, Tony. ==== Anthony B. Coates London Market Systems Limited 33 Throgmorton Street, London, EC2N 2BR http://www.londonmarketsystems.com/ mailto:abcoates@londonmarketsystems.com Mobile/Cell: +44 (79) 0543 9026 [MDDL Editor (Market Data Definition Language), http://www.mddl.org/] [FpML Arch WG Member (Financial Products Markup Language), http://www.fpml.org/] ----------------------------------------------------------------------- This Email may contain confidential information and/or copyright material and is intended for the use of the addressee only. Any unauthorised use may be unlawful. If you receive this Email by mistake please advise the sender immediately by using the reply facility in your e-mail software. Email is not a secure method of communication and London Market Systems Limited cannot accept responsibility for the accuracy or completeness of this message or any attachment(s). Please examine this email for virus infection, for which London Market Systems Limited accepts no responsibility. If verification of this email is sought then please request a hard copy. Unless otherwise stated any views or opinions presented are solely those of the author and do not represent those of London Market Systems Limited. You may leave a Technical Committee at any time by visiting http://www.oasis-open.org/apps/org/workgroup/ubl-lcsc/members/leave_workgroup.php To: marion.royal@gsa.gov@Internet, ubl-lcsc@lists.oasis-open.org@Internet cc: (bcc: CN=Alan Stitzer/OU=NYC-NY/OU=US/OU=Marsh/O=MMC) From: abcoates@londonmarketsystems.com@Internet
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